| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.user.client.ui; |
| |
| import com.google.gwt.dom.client.Document; |
| import com.google.gwt.dom.client.Element; |
| import com.google.gwt.dom.client.InputElement; |
| import com.google.gwt.i18n.client.LocaleInfo; |
| import com.google.gwt.text.shared.Parser; |
| import com.google.gwt.text.shared.Renderer; |
| |
| /** |
| * A text box able to parse its displayed value. |
| * |
| * @param <T> the value type |
| */ |
| public class ValueBox<T> extends ValueBoxBase<T> { |
| |
| /** |
| * Creates a ValueBox widget that wraps an existing <input type='text'> |
| * element. |
| * |
| * This element must already be attached to the document. If the element is |
| * removed from the document, you must call |
| * {@link RootPanel#detachNow(Widget)}. |
| * |
| * @param element the element to be wrapped |
| */ |
| public static <T> ValueBox<T> wrap(Element element, Renderer<T> renderer, Parser<T> parser) { |
| // Assert that the element is attached. |
| assert Document.get().getBody().isOrHasChild(element); |
| |
| ValueBox<T> valueBox = new ValueBox<T>(element, renderer, parser); |
| |
| // Mark it attached and remember it for cleanup. |
| valueBox.onAttach(); |
| RootPanel.detachOnWindowClose(valueBox); |
| |
| return valueBox; |
| } |
| |
| /** |
| * This constructor may be used by subclasses to explicitly use an existing |
| * element. This element must be an <input> element whose type is |
| * 'text'. |
| * |
| * @param element the element to be used |
| */ |
| protected ValueBox(Element element, Renderer<T> renderer, Parser<T> parser) { |
| super(element, renderer, parser); |
| // BiDi input is not expected - disable direction estimation. |
| setDirectionEstimator(false); |
| if (LocaleInfo.getCurrentLocale().isRTL()) { |
| setDirection(Direction.LTR); |
| } |
| assert InputElement.as(element).getType().equalsIgnoreCase("text"); |
| } |
| |
| /** |
| * Gets the maximum allowable length. |
| * |
| * @return the maximum length, in characters |
| */ |
| public int getMaxLength() { |
| return getInputElement().getMaxLength(); |
| } |
| |
| /** |
| * Gets the number of visible characters. |
| * |
| * @return the number of visible characters |
| */ |
| public int getVisibleLength() { |
| return getInputElement().getSize(); |
| } |
| |
| /** |
| * Sets the maximum allowable length. |
| * |
| * @param length the maximum length, in characters |
| */ |
| public void setMaxLength(int length) { |
| getInputElement().setMaxLength(length); |
| } |
| |
| /** |
| * Sets the number of visible characters. |
| * |
| * @param length the number of visible characters |
| */ |
| public void setVisibleLength(int length) { |
| getInputElement().setSize(length); |
| } |
| |
| private InputElement getInputElement() { |
| return getElement().cast(); |
| } |
| } |